Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 707434a0535f8d4b4cc687c15f8f7ff8c0f17079b62e59feaee3479318cf8caf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^